Nonclassicality of a single quantum excitation of a thermal field in thermal environments |
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Authors: | Shang-Bin Li |
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Institution: | Shanghai research center of Amertron-global, Zhangjiang High-Tech Park, 299 Lane, Bisheng Road, No. 3, Suite 202, Shanghai 201204, PR China |
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Abstract: | The nonclassicality of single photon-added thermal states in the thermal channel is investigated by exploring the volume of the negative part of the Wigner function. The Wigner functions become positive when the decay time exceeds a threshold value γtc, which only depends on the effective temperature of the thermal channel. Furthermore, we firstly demonstrate γtc is the same for arbitrary pure or mixed nonclassical optical fields with zero population in vacuum state. |
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Keywords: | 42 50 Dv 03 65 Yz 05 40 Ca |
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